That is a good picture.
You can see all the pens.
Why does he use a different pen to sign each different executive order?
Why does he use a different pen to sign each different executive order?
It's a long tradition that Presidents (and others like Nancy Pelosi when Signing articles of Impeachment) to use several pens to sign something important or historic, so that the pens can be given away as souvenirs.
Sometimes the signer will use several pens on the same signature just to make more pens to give away.